Hello, hope someone might bring a sanity check on this.
Although I've successfully built and use 2 decent quality LDC mics, I haven't done any troubleshooting or repair on a Large Diaphragm condenser.
My friends sent me his Mic when it completely lost all output. First thing I did was open it up for a visual and basic continuity check. I disconnected one of the capsule wires and measured the DCR of the capsule. It measured a little under 2 ohms. My understanding is that a LDC capsule is a capacitor consisting of a backplate and a diaphragm, where the backplate gets charged with a 48vdc phantom voltage. So, its looking like a nearly dead short to me. I expected the capsule to measure like a capacitor, virtually open !
I just wanted to see if some of you might verify my expectations on my friends dead AT4040. Ha, the 2 ohm condenser capsule.
Thank you,
Best, Phil Donovan
Although I've successfully built and use 2 decent quality LDC mics, I haven't done any troubleshooting or repair on a Large Diaphragm condenser.
My friends sent me his Mic when it completely lost all output. First thing I did was open it up for a visual and basic continuity check. I disconnected one of the capsule wires and measured the DCR of the capsule. It measured a little under 2 ohms. My understanding is that a LDC capsule is a capacitor consisting of a backplate and a diaphragm, where the backplate gets charged with a 48vdc phantom voltage. So, its looking like a nearly dead short to me. I expected the capsule to measure like a capacitor, virtually open !
I just wanted to see if some of you might verify my expectations on my friends dead AT4040. Ha, the 2 ohm condenser capsule.
Thank you,
Best, Phil Donovan